code: def verify(self, obj):
      for k, v in self.children.items():
          self._verify_prop(getattr(obj, k, None), k, v)
  
file_path: pytorch-metric-learning/src/pytorch_metric_learning/utils/key_checker.py
imports: from .None import common_functions
label_desc: Use image node_id 4 for calling the KeyCheckerDict obj's underlying member method code with example usage: obj.verify(obj) without return types